“where done on Boostrap 3, Boostrap 4 (which changed a lot of things) or Bootstrap in general?” That’s a good question.
TBH there isn’t much motivating me to look at tailwinds. I know there is a trend to go to more light weight packages but bootstrap isn’t that heavy. I’m not a profession web developer, so perhaps I’m not seeing the big picture.
I am current working on a game. It is work in progress using vanillaJS. If you click on the poo, numbers pop up and disappear on its own. That’s possible with JavaScript. The statistics changing dynamically is the reason why you need JavaScript. https://cowwy.github.io/PooperClicker/